In the study by Liu and colleagues (2012), how did they use optogenetics to activate a specific fear memory?
What will be an ideal response?
Ans: They used transgenic techniques to cause neurons expressing c-fos during a fear conditioning test in the dentate gyrus (a part of the hippocampus) to also produce channelrhodopsin. Later, when light was shown over the hippocampus, the fear response occurred again, despite having the animal in a different environment.
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Consider this scenario: The neuron is dying. All of the structures except the cell body are healthy and undamaged. Why might damage to the cell body be the reason for the neuron's impending death?
A. the cell body is responsible for insulating the neuron B. the nucleus may be damaged C. the cell body receives nourishment from the glial cells D. the cell body maintains the entire neuron in working order
Through which of the following media can sound waves travel?
a. air only b. water only c. air and water d. air, water, and solids
Anesthesia and aphonia are examples of __________ disorder
a) illness anxiety b) conversion c) factitious d) somatic symptom
Sam is 38. He is unemployed and lives with a family member. One afternoon, he shows his neighbor, Sean, a YouTube video of his cousin performing a mediocre rap. “I wrote that!” Sam brags. “We’re going to make it big real soon! I write a lot of
things; I’m in the Poets’ Society of America.” “Well, I’m leaving to go the gym,” Sean says, hoping Sam will leave. Sam responds, “You can work out all the time but you’ll never surpass me.” Sam then describes the expensive brand-name athletic shoes he owns. Sam may have __________ personality disorder. A) schizoid B) borderline C) narcissistic D) antisocial